BMR
1,109kcal
at rest
Sedentary
1,330kcal
×1.2
Lightly active
1,524kcal
×1.375
Moderately active
1,718kcal
×1.55
Show the math
BMR = 10 × 45.4 kg + 6.25 × 162.6 cm − 5 × 40 − 161 = 1,109 kcal
TDEE = 1,109 × 1.375 = 1,524 kcal/day
TDEE by age and activity
Daily calories burned for a 100 lb woman, 5 ft 4 in tall, by age and activity level.
| Age | Sedentary | Lightly active | Moderately active | Very active | Extra active |
|---|---|---|---|---|---|
| Age 20 | 1,450 | 1,662 | 1,873 | 2,085 | 2,296 |
| Age 30 | 1,390 | 1,593 | 1,796 | 1,999 | 2,201 |
| Age 40 | 1,330 | 1,524 | 1,718 | 1,912 | 2,106 |
| Age 50 | 1,270 | 1,456 | 1,641 | 1,826 | 2,011 |
| Age 60 | 1,210 | 1,387 | 1,563 | 1,740 | 1,916 |
| Age 70 | 1,150 | 1,318 | 1,486 | 1,654 | 1,821 |
TDEE by height
Same weight at age 40, different heights.
| Height | Sedentary | Light | Moderate |
|---|---|---|---|
| 5 ft 0 in | 1,254 | 1,437 | 1,620 |
| 5 ft 2 in | 1,292 | 1,481 | 1,669 |
| 5 ft 4 in | 1,330 | 1,524 | 1,718 |
| 5 ft 6 in | 1,368 | 1,568 | 1,768 |
| 5 ft 8 in | 1,407 | 1,612 | 1,817 |
| 5 ft 10 in | 1,445 | 1,655 | 1,866 |
Calories to lose weight
| Goal | Calories/day | Change |
|---|---|---|
| Maintain | 1,524 | 0 |
| Lose 0.5 lb/week | 1,274 | -250 |
| Lose 1 lb/week | 1,200 * | -500 |
| Lose 1.5 lb/week | 1,200 * | -750 |
| Lose 2 lb/week | 1,200 * | -1,000 |
Lightly active, age 40, 5 ft 4 in. * Raised to 1,200 kcal, a common minimum without medical supervision.
How to use it
- Enter your numbers. Switch between US and metric units at any time.
- Results update as you type, and the formula is shown so you can check it.
- Copy the link, save the plan on this device, or print it for your next appointment.
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These are estimates, not a diagnosis. A clinician can account for your health history and medicines.
Nearby weights
Common questions
How many calories does a 100 lb woman burn a day?
About 1,109 calories at rest (BMR) and about 1,524 on a lightly active day, at 5 ft 4 in and age 40. Height, age and activity change it.
How many calories should a 100 lb woman eat to lose weight?
About 1,200 a day for roughly 1 lb a week, if lightly active (a 500-calorie deficit).
Is this exact?
No. Formulas estimate averages within roughly 10% for most people. Track your weight for 2 to 3 weeks and adjust.